Woman who woke up during surgery: 'I wasn't believed'
More than 150 people a year in the UK and Ireland report they have been conscious during surgery - despite being given general anaesthesia.
In the largest study of its kind, scientists suggests this happens in one in every 19,000 operations.
Researchers looked at all cases reported by patients in hospitals across the UK and Ireland over one year.
One woman told BBC Radio 5 live Breakfast that she woke up during an operation when she was 12 years old but doctors did not believe her when she told them about it afterwards.